Features : Bluetooth 5.3 chip, fast and stable connection. Wireless air conduction Bluetooth headsets, no need to put in your ears, protect your ears. Rotatable ear hook design provides comfortable wearing. Provide super clear calls and HiFi sound quality. With a large capacity charging box, provides long standby time and use time. Specification Material: PC+ABS+Electroplating UV Music/call time: about 6H Bluetooth version: BT8926B2 V5.3 Earphone battery capacity: 50mAhx2 Charging box battery capacity: 600mAh Charging time: about 1H/2.5H. One Package Weight: 0.20kgs / 0.44lb One Package Size 15cm * 9.5cm * 5cm / 5.91inch * 3.74inch * 1.97inch